On Wed, Oct 03, 2012 at 08:25:11AM -0600, Jérôme Poulin wrote:
> I don't know how to diagnose the problem, but now it is the second
> time. After starting a VM in VirtualBox and filling the memory, Chrome
> stopped loading any pages. After logging out and on, it still wasn't
> working, reboot fixed it.
>
> This time, I've had the same problem and took the backtrace. Chrome
> starts but doesn't load any pages, I guess it is stuck reading a file
> as many chrome process are in state 'Ds' but are still killable,
> Chrome seems really hard to strace bu anyway strace freezes in D state
> too when attached to a running process.
>
> The whole filesystem is BTRFS.
>
Can you give this a try please? Thanks,
Josef
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 43d1c5a..36eb5f2 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -577,6 +577,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
u64 em_start;
struct extent_map *em;
int ret = -ENOMEM;
+ int faili = 0;
u32 *sums;
tree = &BTRFS_I(inode)->io_tree;
@@ -626,8 +627,11 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
for (pg_index = 0; pg_index < nr_pages; pg_index++) {
cb->compressed_pages[pg_index] = alloc_page(GFP_NOFS |
__GFP_HIGHMEM);
- if (!cb->compressed_pages[pg_index])
+ if (!cb->compressed_pages[pg_index]) {
+ faili = pg_index - 1;
+ ret = -ENOMEM;
goto fail2;
+ }
}
cb->nr_pages = nr_pages;
@@ -713,8 +717,10 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
return 0;
fail2:
- for (pg_index = 0; pg_index < nr_pages; pg_index++)
- free_page((unsigned long)cb->compressed_pages[pg_index]);
+ while (faili >= 0) {
+ __free_page(cb->compressed_pages[pg_index]);
+ faili--;
+ }
kfree(cb->compressed_pages);
fail1:
--
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